Deactivating catalytic effect of metals



.or,{ contacting metals.

United States PatentQ William K. T., Gleim, Orland Park, ,Ill., assignor to Universal Oil Products Company, Des Plaines, 11]., a corporation of Delaware Application February '24, 1953, .Serial No. 338,565

17 Claims; (c1, 155L163) '1 I No Drawing.

This application is. a continuation-in-part of my cpending application Serial Number 138,075, filed January 11, 1950, now abandoned, and relates to a novel method of deactivating the catalytic efiect of a metal contained in an organic substance to catalyze oxidative deterioration of the organic substance.

The novel method of the present invention may. be utilized for the treatment of organic-substances containing metals which catalyze the oxidative deterioration thereof and thus may be utilized for the stabilization of hydrocarbon distillates including motor fuels and particularly unsaturated gasolines,.including cracked gaso-l line, polymer gasoline, etc., kerosene, diesel oil. mineral oil, lubricatingfoil, fueloil, drying .oil, edible fats and oils, soya bean foil, foods, resins, rubber, greases, parafiin waxes, monomers including styrene, butadiene, isoprene',

etc.,acetylenes, alcohols, acids, ketones, and other substrate's containing metals which catalyzeoxidative de-v terioration thereof. Q t ,As applied to gasoline, one method of refining gasoline is. the copper sweetening process, in which process the gasoline is contacted with a copper-sweetening r'e-' agent; As a result of this treatment, the sweetened gaso-.

lineflusually contains relatively small amounts of copper compounds which have a catalytic etfect'on oxidation reactions occurring when the gasoline comes in contact withair. In. addition, gasolines come in contact with various metals in thecourse of. refining, storing and shipping operations, and this also may result in the gasoline containing minor amounts of such metals'a-s iron, cobalt, nickel, chromium, lead, etc.

[As appliedto fatty materials including edible fats and oils these materials are prepared, stored and/or transported? in equipment made of .metal and thereby, tend to undergo ,oxidative deterioration due to the catalytic etfectof the metal. The edible fats and'oils generally are of animal, vegetable or mineral origin. Typical representativesbf these edible fats and oils include linseed oil, mjenhaden oil, cod liver oil, caster-oil, olive oil, rapeseed .oil, coconut oil, palm oil, corn oil, sesamev oil, peanut oil, babassu oil, butter, 'fat, lard, beef 'tallow'; etc., as well asthe hydrogenatedoils. It isunderstood that other oils and fats may be treated within the scope ofthe'present invention, including oils and fats which: have 'previously been subjected to various treatments,

ti'nguished from other additives generally added to orgumfi formation. The metal; deactivator does not sub-- sta'ritially suppress gum formatio'n i'ngasoline in the absence 'of metals, Land orithe 'otlier hand, the gum. iii- These metal deactivators act on th'e metals present in the organic substance and, thereforeg-are effectively utilized in any substrate containing The metal deactivators are dis-' hibitor does not suppress the catalytic efiect of metals to any considerable extent;

, deactivator are both utilized in order ,to prevent undesirable deterioration of the rubber, whichmay: result. in brittleness, discoloration, decreased elasticity, etc. It is understood that these are set fortliflas typical'exarnples of the various substrates to which thenovel'methodpf the present invention may be applied- The metal de activator and other additive supplement Leach other inl ment with an alkali or alkaline earth bisulfite, phosphitd, 'carbonate, etc, It isunderstood thatthis'general, method.

" 'acet'onitrile, etc. otherwise, ketimine formation is-not ob- .1

example, trichloroacetonitrile may be used in acetonitrile.

serving to stabilize organic substrates and-prevenLundesirable deterioration ther'eof. i

In one embodiment the present invention {relates to, amethod of deactivating the catalytic effect of ametal contained in an organic substanceto catalyze deterioration of said organic substance, which comprises adding-there toa compound having the general structure:

where is selected from hydrogen and hydrocarbo'n groups, R is a hydrocarbon group and n is an integer:

In a specific embodiment the present invention relates to a method of deactivating thecatalytic effect of a metal contained in an organic substance to catalyze deteriora tion of said organ'icsubstance, which comprises adding thereto a compound having the general structure: 0H v 1 DEV R' in t whereR' is a hydrocarbon gro'up. 1

weight of 4-resorcinyl-methyl ketimine. g

The preferred metal deactivator foruse in the preser t invention'is prepared by the reaction of resorcinol and,

acetonitrile. This reaction is readily eflected in .the presence ofdry. hydrogen chloride gas at 0 C. to form;

the corresponding ketimine hydrochloride, which is then,

converted to the desired ketimine compound by treat;

of manufacture may be utilized for the preparation the other ketimine compounds and .also that, other sui able methods of preparation may be employeda, For

i l Further, when desired, a catalyjst such s zinc chloride or the like may be employed; Ibis derstood that the aromatic hydroxy compound mus" tain'at least-2 hydroxy groups when aIkyIand aryI tri les are used. 'Phe'nol may be] used 'with"{trichl'or Patented, Apn' 23; 1957 ta iiiable with phenol but instead the imino ether is formed. I

In a broad embodiment, any suitable polyhydroxy aromaticcompound may be utilized in accordance with the present invention,includin'g resorcinol, phloro'glucinol, hydroquinone, hydroxyhydroq'uinorie, catechol, pyro'gal lo l, as well as suitable polyh'ydroxy 'na'phthalenes, including 1,3 dihydroxynaphthalene, 1,4-dihydroiiynaphthalene, etc. j In'place of acetonitrile, other suitable nitril'es may be employed including 'propionitrile, butyronitrile, isobutyronitrile, yaleronitrile, 'capro'r'iitrile, etc. i I In the metal deactivator "of the present inventionit is essential that a hydroxy group is present in a position ortho to the ketimine group. In the preferred metal deactivators, a second hydroxy group is attached to the ring a position meta to the first hydroxy group which in turn ortho to the ketiin'ine group. Thus, the preferred polyhydr'oxy aromatic compounds to be utilized in preparing the "metal deactivator comprise resorcinol, pyrogallol, hydroxyhydr'oquinone and phloroglucinol, as well as similarly substituted polyhydroxy naphthalenes, It is also understood that, in place of one of the hydroxy groups, except the hydroxy positioned 'ortlio to the ketimine group, analkoxy group may be utilized as, for example, methoxy, ethoX'y, propoxy, butoxy, etc. It is understood that the aromatic ring may contain other substituents and particularly hydrocarbon radicals such as methyl, ethyl, propyl,

butyl, etc. Also," in the preferred metal deactivators, the R radical preferably comprises a hydrocarbon group of from 1 to about 4 carbon atoms. I

Referring to the general structure hereinbefore set forth, it will be noted that R and R comprise hydrogen or hydrocarbon groups. When R is hydrogen, n is 1 and R is an alkyl substituent, the deactivator will comprise a catechyl-alkyl ketimine, a resorcinyl-alkyl ketimine or a hydroquinyl-alkyl ketimine. When R is hydrogen, n is 2 and R is an alkyl substituent, the deactiyator will comprise a pyrogallyl-alkyl ketimine, a hydroXy-hydroquinylalkyl. ketimine or a phloroglucinyl-alkyl ketimine. Specific compounds of these classes include 3-catechylmethyl ketimine, 3'-catechyl-ethyl ketimine, 3-catechyl propyl ketimine, 3'-'catechyl-butyl ketimine, 3-catechylamyl ketimine, 3-catechyl-hexyl ketimine, B-catechylheptyl ketimine, 3-catechyl-octyl ketimine, 3-catechylnonyl ketimine, 3-catechyl-d'ecyl ketimine, 3-catechylundecyl ketimine, 3-catechyl dodecyl ketimine, etc., 4- resorcinyl-methyl-ketimine, 4-resorcinyl-ethyl ketimine, 4-resorcinyl-propyl ketimine, 4'-resorcinyl-butyl ketimine, 4-resorcinyl-amyl ketimine, 4-resorcinyl-hexyl ketimine, 4-resorciny1-heptyl ketimine, 4-resorcinyl-octyl ketimine,

4-resorcinyl-nonyl ketimine, 4-resor cinyldecy1 ketimine, 4-resorcinyl-undecyl ketimine, 4-re'sorcinyl-dodecyl ke 4-pyrogallyl-undecyl ketimine, 4-pyrogallyl-dodecyl ketimine, etc., 2-(5-hydroxy-hydroquinyl)metliyl ketimine, 2-(5-hydroXy-hydroquinyl)-ethyl ketimine, Z-(S-hydroxyhydroquinyl) -propyl ketimine,- 2-(5-liydroxy hydroquinyl)' butyl ketimine, etc., 2 (6-hydroxy-hydroquinyl)-methyl' 'ketimine, 2-(6-hydroxy hydroquinyl) -ethyl ketimine,

2 (6 hydroxy-hydroquinyl)-propyl ketimine, 2( 6-hy- I droay-hydroquinylybutyl ketimine, etc., phloroglucinylmethyl ketimine, phloroglucinyl-ethyl ketimine,; phlorogluciny'bpropyl ketimine,- phloroglucinyl-butyl; ketimine,

phloroglucinyl-amyl ketimine,- phloroglucinyl-hexyl ketij in "2,789,912

mine, phloroglucinyl-heptyl ketimine, phloroglucinyloctyl ketimine, phloroglucinyl-nonyl ketimine, phloroglucinyl-decyl ketimine, phlit'iroglucinyl-undecyl ketimine, phloroglucinyl-dodecyl ketimine, etc.

As hereinbefore set forth the aromatic ring may contain other substituents. For example, when the benzene ring contain another benzene ring attached thereto the aromatic portion will be naphthyl and include such compounds as, forexample, 4-(1,3-dihydroxy-naphthyl)- rnethyl ketimine, 4-'(1,3-dihydroXy-naphthyl)-ethy1 ketimine, 4 (1,3 dihydroxy naphthyl) propyl ketimine, 4 1,3 dihydroxy naphthyl) butyl ketimine, 4 (1,3- dihydroxy naphthyl) l amyl ketimine,, 4 (1,3 dihydroxy naphthyl) hexyl ketimine, 4 (1,3 dihydroxynaphthyl) heptyl ketimine, 4 (1,3 dihydroxy naphthyl) octyl ketimine, 4 (1,3 dihydroxy naphthyl)- nonyl ketimine, 4 (1,3 dihydroxy naphthyl) decyl ketimine, 4 (1,3 dihydroxy naphthyl) undecylketimine,'4 (1,3 dihydroXy naphthyl) dodecyl ketimine, etc., 3 (2,4 dihydroxy 7 naphthyl) methyl ketimine, 3 2,4 dihydroxy {naphthyl) ethyl ketimine, 3 7 (2,4: dihydro-Xy naphthyl) propyl ketimine, 3 (2,4 dihydroxy naphthyl) butyl ketimine, etc., .3 (1,2 -,dihydroxy naphthyl) methyl ketimine, 3 1,2 dihydroxynaphthyl) ethyl ketimine, 3v (1,2 7 dihydroxy naphthyl) propyl ketimine, 3 (1,2 dihydroxy naphthyl) butyl ketimine, etc., 1,3,5 trihydroxynaphthyl alkyl ketimines, 1,3,6 4 trihyd'roxy naphthyl alkyl ketimines, 1,3,6 trihydroxy naphthyl alkyl ketimines, etc., 2,4,5 trihydroxy naphthyl alkyl ketimines, 2,4,6 trihydroxy naphthyl alkyl ketimines, etc. i v I When the aromatic ring contains an alkyl substituent attached thereto; specific compounds include 4-(6-methy lres'o'rcinyD-rnethyl ketimine, 4-( 6-ethyl-resorcinyl)-methy l ketimine, 4-(o-propyl-resorcinyl)-methyl k timin 6-buty1-resorciriyl)-methy1 ketimine, 4- (6-amyl-r esorciny1,)-methyl ketimine, 4-(6-hexyl-resorcinyl)-methy1 ketimine, etc., 4-(6-rnethyl resorcinyl)-ethyl ketimine, 4-(6- ethyl-r'esorcinyD-ethyl ketimine, 4-'(6 propyl-resorcinyl)- ethyl ketimine, 4-(6 -butyl-resorcinyl)-ethyl ketimine, 4- 6-amyl-resor'cinyl)-ethyl ketimine, 4-(6-heXyl-resorc1nyl)-ethyl ketimine, etc., 4-( 6-methyl-resorcinyl)-pi opyl ketimine, 4 (6-ethyl-reso'rcinyl) propyl ketimine, 4-(6- butyl-resoifcinyl)-propyl ketimine, 4- (6-amy1-resorcinyl) propyl ketimine, 4%(6-hexyl-resorcinyl) pr'opyl ketimine, etc., 4 (6-rnethyl-resorcinyl)-butyl ketimine, 4-(6-ethy1; re'so'rcin'yD bu'tyl ketimine, 4-(6-propyl-resorcinyl)-butyl ketimine, 4-(6-butyl-resorcinyl)-butyl ketimine, 4-(6- amyl-resorcinyl)-butyl ketimine, 4 (6-heXy1-resorcinyl)-' butyl ketimine, etc., similar res'o'rciriol derivatiyes in which the alkyl group attached to the aromatic ring is substitutedin the 2 or 5 positions, and compounds in which 2 or more alkyl groups are substituted i'n'the 2, 5 and/or 6 positions. Substituted catechyl ketimine's may (contain 1 or more alkyl groups attached to the aromatic ri ng in the 4, 5 and/or 6 positions, and substituted hydro quinyl ketimines may contain one or more substituents in the 3, 5 and/or 6 positions. With the trihydroxy ketimine compounds, alkyl substit uents may be positioned in the 5 and/or 6 positions of pyro'gallyl ketimines, the S and/ or 6 positions of the hydroXy-hyclroquinyl ketimines and in the 4 and/or 6 positions of the phloroglucinyl ketimines. I v v I n I When R in the above structure is a hydrocarbon group, the substituent will be alkoxy, pheno ry, cycloalkoxy, etc., and it may comprise a heterocyclic group. Specific, compounds in this class include 4-(1-methoxy-3-hydroxyf phenyl -methyl ketimine, 4-( 1-etho gy-3 -hydrony-phenyll methyl ketimine, 4-(1 propoxy ii-hydroxy-phenyl)-meth yl ketimine, 4-(1-butoxy-3-hydrorry-phenyl)-methyl ketimine, 4-(1-pentoxy3 hydroxy phenyl)methyl ketimine,

4 (1-hexoxy-3-hydroxy phenyl) -methyl ketimine, etc., and

Woman dodecyl, etc. Still otherispecific compounds include; 4-- l-rnethoxyresorcinylo-methyl3 eketirnine, 4-(-2-,ethgnry-- resoreinyD-methyl ketimine, 4-(2-ethoxy resorcinyl)-ethyl ketimine, 4-(2-propoxy-resorcinyl)-ethyl ketimine, 4- (Z-propoxy-resorcinyl)-propyl ketimine, 4-(2-butoxyresorcinyll-propyl ketimine, 4-(2-butoxy-resorcinyl)-butyl ketimine, 4-(2-pentoxy-resorcinyl)*butyl ketimine, 4-(2- butoxyresorcinyD-amyl ketimine, 4-(2-pentoxyrresorcinol)-amyl ketimine, etc., 4-(2-phenoxy-resorcinyl)-methyl ketimine, 4-(2-phenoxy-resorc'inyl)-ethyl ketimine, 4-(2- phenoXy-resorcinyl)-propyl ketimine, 4-(2-phenoxy-resorcinyl)-butyl ketimine, 4-(2-phenoxy-resorcinyl)-amyl ketimine, 4-(2-phenoxy-resorcinyl)-hexyl ketimine, etc., 4-(2-cyclohexoxy-resorcinyl)-methyl ketimine, 4-(2-cyclohexoxy-resorcinyl)-ethyl ketimine, 4-(2-cyclohexoxy-resorcinyl)-propyl ketimine, 4-(Lcyclohexoxy-resorcinyl)- butyl ketimine, 4-(2-cycloheXoxy-resorcinyl)-amyl ketimine, 4-(2-cyclohexoxy-resorcinyl) -hexyl ketimine, etc., and resorcinol derivatives containing one or more substituents in the.5 and/ or 6 positions alone or in addition to a substituent in the 2 position and correspondingly substituted catechyl ketimines, hydroquinyl ketimine's, pyrogallyl ketimines, hydroxyhydroquinyl ketimines and phlor'og'lucinyl ketimines. Specific compounds containing a heterocyclic group include 5-(6-hydroxy-coumaranyl)-methyl ketimine, 5-(6-hydroxy-coumaranyl)-ethyl ketimine, 5-(6-hydroxy-coumaranyl)-propyl ketimine, 5- (6-hydroxy-cournaranyl)-butyl1 ketimine, 5-(6-hydroxycoumaranyl) -amyl ketimine, '5-(6-hydroxy-coumaranyl) hexyl ketimine, etc., 5-(4,6-dihydroxy-coumaranyl)-methyl ketimine, 5-(4,6-dihydroxy-coumaranyl)-ethyl ketimine, 5-(4,6-dihdroxy-coumaranyl)-propyl ketimine, 5- (4,6-dihydroxy-coumaranyl)-butyl ketimine, 5-(4,6-dihydroxy-coumaranyl)-amyl ketimine, 5-(4,6-dihydroxy-coumaranyl)-hexyl ketimine, etc., 6-(7-hydroxy-chromanyl)- methyl ketimine, 6-(7-hydroxy-chromanyl)-ethyl keti-. mine, 6-(7hydroxy-chromanyl)-propyl ketimine, 6-(7-hydroxy-chromanyl)-butyl ketimine, 6-(7-hydroxy-chromanyl)-amyl ketimine, 6-(7-hydroxy-chromanyl)-hexylketimine, etc., 6-(5,7-dihydroxy-chromanyl)-methyl ketimine, 6-(5,7-dihydroxy-chromanyl)-ethyl ketimine, 6-(5,7-dihydroxy-chromanyl)-propyl ketimine, 6-(5,7-dihydroxychromanyl)-butyl ketimine, 6-(5,7-dihydroxy-chromanyl)-amyl ketimine, 6-(5,7-dihydroxy-ehromanyl)-hexyl ketimine, etc.

R in the above structure preferably is an alkyl group and specific compounds of thisclass are hereinbefore set forth. When R is a phen'yl'group, specific compounds may comprise 4-resorcinyl-phenyl ketimine, Z-hydroquinyl-phenyl ketimine, 4-pyrogallyl-phenyl ketimine, 3-, 5- and/or 6-hydroxy-hydroquinyl-phenyl ketimines, phloroglucinyl-phenyl ketimines, etc. When R is a cyclohexyl group specific compounds may comprise 4-resorcinyl-cyclohexyl ketimine, Z-hydroquinyl-cyclohexyl ketimine, 4- pyrogallyl-cyclohexyl ketimine, 2-(5-hydroxy-hydroquinyl)-cyclohexyl ketimine, phloroglucinyl-cyclohexyl ketimine, etc. q

It is understoodthat numerous compounds may be prepared and utilized in accordance with the present invention but that these compounds will not necessarily be equivalent. For example, some compounds may be more effective in one substrate than in other substrates. However, all of these compounds will be effective in retarding oxidative deterioration catalyzed by metals present in the substrate.

In some cases it is preferred that thetotal number of carbon atoms in the metal deactivator should not exceed about 12. These compounds are of small molecular size 7 and are very efiective in very low concentrations. Therefore, they may be used in very small amounts in most substrates. In other cases larger molecular size compounds are desired for increased solubility in certain substrates. Inlone method, for example, R may comprise a ysmea b'o'n groupjcontainingfrom 11m about' c'arb on atoms.

- butyl-p-phenylene-diamine. Another particularly suitable gum inhibitor comprises a p-aminophenol and mere pai As hereinbefore set forththemetal deactivator generally will be vused in conjunction with ,otheradditives. The

butylated hydroxyanisole. Other antioxidants include nordihydroguaiaretic acid (N. D. G. A.), gum uai'ac;

propyl gallate, lauryl thiodipropionate, various alkylated phenolic compounds including 2,6-ditertiary-butyli-mth ylphenol, 2,4-dimethyl-6-tertiary-butylphenol, etc. 1 Asap plied to gasoline, satisfactory gum'inhibitors include ivari-if ous phenols, amines, aminophenols, fractions of wood tar,

etc. Some of these inhibitors are marketed in the form of a solution in a solvent such as alcohol, ether,'etc. }A

particularly suitable gum inhibitor comprises a p-phenyl f ene-diamine and more particularly N,N-di-secondaryticularly a mixture of a major proportion of N-n-btityl p 1 aminophenol and a minor proportion of -N,N'-di-n-butylp-phenylene-diamine in an alcoholic solvent. Still other-- suitable inhibitors comprise butylated hydroxyanisole and 2,2-dimethyl-6-tertiary-butyl-S-hydroxy-cotimaran. 4

The antioxidant, gum inhibitor or other additive gen erally is utilized in concentrations of below about 1% by weight and preferably from about 0.001% to about 1% by I weight. As hereinbefore set forth, the metal deactivator is utilized in small concentrations and thus may range from about 0.000l% to about 0.5% by weight of the 'substrate. The metal deactivator may be'marketed as such; or dissolved in a suitable solvent which is not reactive therewith. In some cases, when a solvent is used for the H antioxidant, gum inhibitor, etc., the same solvent may be used for the metal deactivator and thus the '2 or more compounds, when desired, may be prepared as a mixture in a suitable solvent and the product marketed as asinglef commodity of a two-fold purpose.

The following examples are introduced to illustrate further the novelty and utility of thepresent invention but not with the intention of unduly; limiting the same.

Example I A metal deactivator was prepared by reacting an equal molecular mixture of resorcinol and acetonitrile with dry hydrogen chloride gas at 0 C. This resulted in the separation of a crystalline yellow precipitate of the 'ketimine 7 hydrochloride which was then treated with sodium bisulfite to form 4-resorcinyl-methyl ketimine which has the following structure:

The 4-resorcinyl-methyl ketimine, prepared in the above manner, was utilized for the stabilization of a Pennsylvania cracked gasoline which had a blank induction pej Upon the addition of 0.006% by riod of minutes. weight of a guru inhibitor comprising N,N'-di-secondarybutyl-p-phenylene-diamine, the induction period was increased to 450 minutes. However, upon the addition of I 0.5 mg. of copper per liter to another sample of the duced a final gasoline of high stability.

Example ll v Example III The lard used in this example had a normal stability period of 4 hours as determined by the Active Oxygen Method. This method is a standard test for determining sta'bilityot lard. In general, this test comprises bubbling air through a sample of the lard and periodically determining the peroxide number. The results are reported as the ri umber of hours required to reach a peroxide number of 20,

In order to determine the effect of metal, a 3 inch strip of 18 gauge copper wire was added to a sample o the lard. .The stability of the lard was reduced from 4 hours to 1 hour in the presence of copper. However, upon the addition of 0.02% by weight of 4-resorcinylmethyl ketimine to another sample of the lard containing copper, the stability of the lard was increased to 4 hours. If thus will be noted that the metal deactivator compound ofithe present invention served to effectively offset the deleterious effect of the copper.

0.02% by weight of butylated hydroxyanisole was added to another sample of the lard and, in the absence of copper, the lard had a stability period of about 33 hours. il-lowever, upon the addition of copper to the lard containing .hutylated hydroxyanisole, the stability period dropped to 2 hours. From the above data it is noted that thebutylated hydroxyanisole, while a very effective antioxidant in the absence of the copper, was of substantial- 1y no potency in the presence of the copper. Upon the addition of both butylated hydroxyanisole and 4-resorcinyl-methyl ketimine to'the lard, the stability of the lard was increased to 22.5 hours.

' i Example IV Phloroglucinyl-ethyl ketimine may be prepared by reaetingjphlor oglucinol and propionitrile in the presence of dry hydrogen chloride gas and zinc chloride catalystin the manp l'h r inbefore set forth for the preparation of the resorcinyl-methyl ketimine. 0.001% by weight of phloroglucinyl-ethyl ketimine may be incorporated in parafiin wax to retard oxidative deterioration caused by metal.

Example V This example illustrates the use of the metal deactivator for the stabilization of rubber to prevent oxidative deterioration catalyzed by metals. 0.02% by weight of 4-re'sorcinyl-methyl ketimine may be added to the latex resulting from the emulsion polymerization of butadiene and styrene, after which the latex is coagulated and dried. This will serve to retard oxidative deterioration catalyzed by inetals and the rubber, therefore, will be improved as to..color, strength, elasticity, etc.

'I claim as my invention:

,1, An organic material containing a metal which normally catalyzes oxidative deterioration of said material and additionally containing a metal deactivating amount of a ketimine compound having the general structure:

n f n.

8 where 'R is selected from hydrogen and hydrocarbon groups, R is an aliphatic hydrocarbon group of from 1 to about 20 carbon atoms and it is an integer of from 1 to 2.

2. An "organic material containing a metal which normally catalyzes oxidative deterioration of said material and additionally containing a metal deactivating amount of a ketimine compound having the general structure:

OH whereR' is an aliphatic hydrocarbon group of from 1 to about 20 carbon atoms.

3. A composition as defined in claim 2 further characterized in that said hydrocarbon group is an alkyl radical of from 1 to about 4 carbon atoms.

4. Gasoline containing a metal compound which catalyzes oxidative deterioration and additionally containing a metal deactivating amount of a ketimine compound having the general structure:

(not. OH

, 1hr where R is selected from hydrogen and hydrocarbon groups, R is an aliphatic hydrocarbon group of from 1 to about 20 carbon atoms and n is an integer of from 1 to 2.

5. Gasoline containing a metal compound which catalyzes oxidative deterioration and additionally containing a metal deactivating amount of a ketimine compound having the general structure:

OH (Le i'lH where R is an aliphatic hydrocarbon group of from 1 to about 20 carbon atoms. A

6. A composition as defined in claim 5 further characterized in that said hydrocarbbon group is an alkyl radical of from 1 to about 4 carbon atoms.

7. An organic material containing a metal which normally catalyzes oxidative deterioration of said material and additionally ontaining a metal deactivating amount of an aromatic ketimine having hydroxy groups in positions ortho and para withrespect to the ketimine group and the carbon atom of the ketimine group having attached thereto an aliphatic hydrocarbon radical from 1 to about 20 carbon atoms. I

8. Gasoline containing a metal which normally catalyzes oxidative deterioration of the gasoline and additionally containing a metal deactivating amount of 4-re' sorcinyl-methyl ketimine.

I 9. Cracked gasoline containing a metal which catalyzes oxidative deterioration of said gasoline and additionally containing from about 0.0001% to about 0.5% by weight of 4-resorcinylmethyl ketimine.

10. Cracked gasoline containing a metal which catalyzes oxidative deterioration of said gasoline andadditionally containing from about 0.001% to about 1% by weight Ofagum inhibitor and from about 0.0001% to about 055 by "weightof"4 resorcinyl=metliyl ketimine.

11. Cracked gasoline containing a metal which catalyzes oxidative deterioration of said gasoline and additionally containing from about 0.001% to about 1% by weight of a p-phenylene diamine gum inhibitor and from about 0.0001% to about 0.5% by weight of 4-resorcinylmethyl ketimine.

12. Cracked gasoline containing a metal which catalyzes oxidative deterioration of said gasoline and additionally containing from about 0.0001% to about 1% by weight of a p-aminophenol gum inhibitor and from about 0.0001% to about 0.5% by weight of 4-resorcinylmethyl ketimine.

13. Lard containing a metal which catalyzes oxidative deterioration of said lard and additionally containing from about 0.0001% to about 0.5% by weight of 4- resorcinyl-methyl ketimine.

14. Lard containing a metal which catalyzes oxidat'ive deterioration of the lard and additionally containing from about 0.001% to about 1% by weight of an antioxidant and from about 0.0001% to about 0.5% by weight of 4- 20 2,700,682

resorcinyl-methyl ketimine.

15. Lard containing a metal which catalyzes oxidative deterioration of the lard and additionally containing from about 0.001% to about 1% by weight of butylated hydroxyanisole and from about 0.0001% to about 0.5% by Weight of 4-resorciny1-methyl ketimine.

l6. Lard containing a metal which catalyzes oxidative deterioration of the lard and additionally containing from about 0.001% to about 1% by weight of 2,6-ditertiary-butyl-4-methylphenol and from about 0.0001% to about 0.5% by weight of 4-resorcinyl-methy1 ketimine.

17. A composition as defined in claim 7 further characterized in that said hydrocarbon radical is an alkyl group of from 1 to about 4 carbon atoms.

References Cited in the file of this patent UNITED STATES PATENTS Chenicek Apr. 18, 1944 Chenicek Aug. 17, 1954 Blomberg Jan. 25, 1955 

1. AN ORGANIC MATERIAL CONTAINING A METAL WHICH NORMALLY CATALYZES OXIDATIVE DETERIORATION OF SAID MATERIAL AND ADDITIONALLY CONTAINING A METAL DEACTIVATING AMOUNT OF A KETIMINE COMPOUND HAVING THE GENERAL STRUCTURE: 